CN217955892U - Three-dimensional porous current collector preparation equipment of lithium ion battery - Google Patents
Three-dimensional porous current collector preparation equipment of lithium ion battery Download PDFInfo
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- CN217955892U CN217955892U CN202220156085.2U CN202220156085U CN217955892U CN 217955892 U CN217955892 U CN 217955892U CN 202220156085 U CN202220156085 U CN 202220156085U CN 217955892 U CN217955892 U CN 217955892U
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Abstract
The utility model discloses a three-dimensional porous mass flow body preparation facilities of lithium ion battery, including vacuum cavity, evacuating device, unreel the roller, the wind-up roll, unreel drive arrangement, rolling drive arrangement, the coating film home roll, evaporation crucible and control system, unreel the roller, wind-up roll and coating film home roll can the pivoted respectively install in vacuum cavity, unreel drive arrangement and rolling drive arrangement drive respectively and unreel roller and wind-up roll synchronous revolution, the fibre fabric that draws forth on the unreeling roller walks around the coating film home roll surface after twining on the wind-up roll surface, in the evaporation crucible is fixed in the vacuum cavity, evaporation crucible opening is just right with the fibre fabric on the coating film home roll surface, the evaporation crucible is equipped with heating device, heating device can heat the coating film material in the evaporation crucible, evacuating device can give the cavity evacuation, each mechanism operation of control system control, the utility model discloses the mass flow body that obtains had both kept the pliability, tensile and mesh characteristic of fibre, has electric conductivity again.
Description
Technical Field
The utility model relates to a mass flow body preparation equipment, in particular to three-dimensional porous mass flow body preparation equipment of lithium ion battery.
Background
The lithium electronic battery mainly comprises a positive electrode material, a negative electrode material, a separation film and an electrolyte. The positive and negative electrode materials are stored by adopting current collectors, for a lithium ion battery, the commonly used positive current collector is an aluminum foil, the negative current collector is a copper foil, the surfaces of the aluminum foil and the copper foil are smooth and flat, the effective reflection area is limited, the battery can expand with heat in the charging and heating process, repentance and contraction with cold are required after charging, the copper foil and the aluminum foil are not elastic, the tensile property is poor, the battery is easy to damage in the expansion with heat and contraction with cold, and dendrites are easy to produce on the surfaces of the copper foil and the aluminum foil in the charging process of the lithium ion battery, so that the short circuit in the battery is caused.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects, the utility model provides a three-dimensional porous mass flow body of lithium ion battery preparation equipment, the three-dimensional porous mass flow body of lithium ion battery effective reaction area who adopts the three-dimensional porous mass flow body of lithium ion battery preparation equipment production is big, helps reducing the formation of dendritic crystal among the lithium ion battery charging process, can adapt to the battery charge the expend with heat and contract with cold change that generates heat.
The utility model discloses a solve the technical scheme that its technical problem adopted and be: the utility model provides a three-dimensional porous mass flow body preparation equipment of lithium ion battery, includes vacuum chamber, evacuating device, unreels roller, wind-up roll, unreels drive arrangement, rolling drive arrangement, coating film home roll, evaporation crucible and control system, unreel roller, wind-up roll and coating film home roll can be the pivoted respectively and install in vacuum chamber, unreel drive arrangement and rolling drive arrangement drive respectively and unreel roller and wind-up roll synchronous revolution, the fibre fabric that draws forth on the unreeling roll walks around coating film home roll one side surface after twines on the wind-up roll surface and rolls, evaporation crucible fixed mounting is in vacuum chamber, evaporation crucible opening is just right with the fibre fabric on coating film home roll one side surface, evaporation crucible is equipped with heating device, heating device can heat the coating film material in the evaporation crucible, evacuating device can give the evacuation of chamber cavity, control system control evacuating device, unreel drive arrangement, vacuum drive arrangement and heating device operation.
As a further improvement, the utility model is also provided with working gas providing device and anode layer ion source, the anode layer ion source is located the vacuum cavity, and working gas providing device can provide inert gas for the anode layer ion source, the anode layer ion source can be towards the coating film home roll surface be about to with the positive fiber fabric surface emission anode layer ion of evaporation crucible, and control system control working gas providing device and anode layer ion source open and stop the action.
As the further improvement of the utility model, the water-cooling baffle is fixed in the vacuum cavity, unwinding roll, wind-up roll and anode layer ion source are located water-cooling baffle one side, and the evaporation crucible is located water-cooling baffle opposite side, is formed with open structure on the water-cooling baffle, and the coating film home roll is just right through with one side that the evaporation crucible is just right open structure stretches into water-cooling baffle opposite side.
As a further improvement of the present invention, the coating main roller includes a first surface coating main roller and a second surface coating main roller, the evaporation crucible includes a first surface evaporation crucible and a second surface evaporation crucible, the anode layer ion source includes a first surface anode layer ion source and a second surface anode layer ion source, at least one first surface coating main roller and at least one second surface coating main roller are arranged in the vacuum cavity in parallel at intervals, at least one first surface evaporation crucible is just to setting up with each first surface coating main roller respectively, at least one second surface evaporation crucible is just to setting up with each second surface coating main roller respectively, first surface anode layer ion source and second surface anode layer ion source are just to carrying out vacuum deposition's both sides surface with fabrics respectively.
As a further improvement, the evaporation crucible includes graphite crucible, insulating ceramic layer, panel beating parcel skin, gas phase silicon heat insulation layer, shielding plate and shelters from drive arrangement, graphite crucible forms open-ended slot-shaped structure for the upper end, and the fixed cladding of insulating ceramic layer is in the graphite crucible outside, and heating device is the resistance steel sheet zone of heating, the fixed cladding of resistance steel sheet zone of heating is in the insulating ceramic layer outside, and the fixed cladding of gas phase silicon heat insulation layer is in the resistance steel sheet zone of heating outside, and the outer fixed cladding of panel beating parcel is in the gas phase silicon heat insulation layer outside, the shielding plate can be opened and the opening of closed graphite crucible upper end, shelter from drive arrangement drive shielding plate motion and realize open-and-close, control system control shelter from drive arrangement and open and stop the action.
As a further improvement, the utility model discloses a still be equipped with a plurality of auxiliary rollers, each auxiliary roller can the pivoted install in the vacuum chamber, twine in coating film main roll side surface after at least one auxiliary roller direction from the fiber texture that draws forth on the unwinding roller, twine in the wind-up roll outside after at least one auxiliary roller direction from the fiber texture that draws forth on the coating film main roll, be equipped with blowing tension sensor on an auxiliary roller between unwinding roller and the coating film main roll, be equipped with on an auxiliary roller between receiving roller and the coating film main roll and receive material tension sensor, blowing tension sensor and receive material tension sensor can respond to respectively from the fiber texture tension that draws forth on the unwinding roller and be about to coil the fiber texture tension on receiving the roller, blowing tension sensor and receive material tension sensor respectively with control system electric connection communication.
As a further improvement of the utility model, a cooling interlayer is formed inside the coating film main roller, and a refrigerant is introduced into the cooling interlayer.
The utility model has the advantages that: the utility model discloses a fabrics of 5 ~ 10um thickness is as the carrier, copper product or aluminum product through dedicated equipment at fabrics surface vacuum deposition 1 ~ 2um thickness, make fabrics form a three-dimensional porous structure's mass flow body, this kind of mass flow body has both kept fabrics's pliability, stretch-proofing and fabrics unique mesh characteristic, has had the electric conductivity of copper product and aluminum product again (test resistance ≦ 20m omega), the utility model discloses a 4 continuous coating film modes of coating film main roll, can once only deposit copper product or aluminum product at fabrics tow sides to can pierce through the gap of fabrics with the copper deposit to the surface of every cellosilk, adopt the utility model discloses the three-dimensional porous mass flow body of preparation has increased the effective reaction area of electrode, has reduced the formation of dendritic crystal among the lithium ion battery charging process, has improved active material reflection efficiency in the battery, the heat-shrinkage cold-contraction change that adaptation battery charging that can be better generates heat, effectively promotes lithium ion secondary battery's performance.
Drawings
Fig. 1 is a schematic diagram of the structural principle of the three-dimensional porous current collector preparation equipment for the lithium ion battery of the present invention;
FIG. 2 is a schematic view of the structure principle of the evaporation crucible of the present invention;
fig. 3 is the utility model discloses the three-dimensional porous mass flow body structure principle sketch of preparation of lithium ion battery.
Detailed Description
Example (b): the utility model provides a three-dimensional porous mass flow body preparation facilities of lithium ion battery, includes vacuum chamber 12, evacuating device, unreels roller 1, wind-up roll 2, unreels drive arrangement, rolling drive arrangement, coating film home roll, evaporation crucible and control system, unreel roller 1, wind-up roll 2 and coating film home roll respectively can the pivoted install in vacuum chamber 12, unreel drive arrangement and rolling drive arrangement drive unreel roller 1 and wind-up roll 2 synchronous revolution respectively, the fibre fabric that draws forth on unreeling roller 1 walks around coating film home roll side surface after twines in wind-up roll 2 surface and rolls, evaporation crucible fixed mounting is in vacuum chamber 12, evaporation crucible opening and the fibre on coating film home roll side surface just right, the evaporation crucible is equipped with heating device, heating device can heat the coating film material in the evaporation crucible, evacuating device can be for vacuum chamber 12 evacuation, control system control evacuating device, unreel drive arrangement, rolling drive arrangement and heating device operation.
The fiber fabric is unreeled along with the rotation of the unreeling roller 1, passes through the coating main roller after being led out from the unreeling roller 1, is just opposite to an opening of an evaporation crucible while bypassing the coating main roller, a metal material evaporated from the evaporation crucible is deposited on the surface of the fiber fabric to form a metal coating layer, and the coated fiber fabric is finally reeled by the reeling roller 2.
The anode layer ion source is positioned in the vacuum cavity 12 and can provide inert gas for the anode layer ion source, the anode layer ion source can face the surface of the coating main roller and emit anode layer ions on the surface of the fiber fabric just opposite to the evaporation crucible, and the control system controls the working gas providing device and the anode layer ion source to start and stop. The anode layer ion source is used for cleaning the fiber fabric before vacuum coating, so that the surface of the fiber fabric is clean, the film coating layer is firmly combined on the surface of the fiber fabric, and the layered falling is prevented.
The vacuum furnace is characterized in that a water-cooling partition plate 11 is further fixedly arranged in the vacuum cavity 12, the unwinding roller 1, the winding roller 2 and the anode layer ion source are located on one side of the water-cooling partition plate 11, the evaporation crucible is located on the other side of the water-cooling partition plate 11, an opening structure is formed in the water-cooling partition plate 11, and one side, right opposite to the evaporation crucible, of the coating main roller just stretches into the other side of the water-cooling partition plate 11 through the opening structure.
Divide into two parts through water-cooling baffle 11 with vacuum chamber 12, will unreel roller 1, wind-up roll 2 and anode layer ion source and place in cold water baffle one side, set up the evaporation crucible in cold water baffle opposite side, it can prevent that the metal material deposition that the evaporation came out in the evaporation crucible from causing fibre fabric surface metal coating thickness uneven at other positions of fibre fabric, can play the effect of thermal-insulated cooling simultaneously, prevent that the heat that the evaporation crucible gived off from conducting on fibre fabric and anode layer ion source.
The coating main roller comprises a first surface coating main roller 6 and a second surface coating main roller 7, the evaporation crucibles comprise a first surface evaporation crucible 14 and a second surface evaporation crucible 15, the anode layer ion source comprises a first surface anode layer ion source 9 and a second surface anode layer ion source 10, at least one first surface coating main roller 6 and at least one second surface coating main roller 7 are arranged in the vacuum cavity 12 in parallel at intervals, at least one first surface evaporation crucible is respectively arranged opposite to each first surface coating main roller 6, at least one second surface evaporation crucible is respectively arranged opposite to each second surface coating main roller 7, and the first surface anode layer ion source 9 and the second surface anode layer ion source 10 are respectively opposite to the two side surfaces of the fiber fabric to be subjected to vacuum deposition. The fiber fabric passing through the first surface coating main roller 6 is subjected to first surface vacuum coating, then the fiber fabric is reversely wound on the second surface coating main roller 7, the other surface of the fiber fabric is subjected to vacuum coating, the first surface coating main roller 6, the second surface coating main roller 7, the first surface evaporation crucible and the second surface evaporation crucible are preferably two, the first surface of the fiber fabric is subjected to twice vacuum coating, and the second surface of the fiber fabric is subjected to twice vacuum coating, so that the two surfaces of the fiber fabric are continuously coated with films, metal film materials can be deposited on the front surface and the back surface of the fiber fabric at one time, metal materials can be deposited on the surface of each fiber yarn through gaps of the fiber fabric, and the fiber fabric can reach the same conductivity as a copper foil or an aluminum foil through twice coating of each surface.
Evaporating crucible includes graphite crucible 16, insulating ceramic layer 17, panel beating parcel outer 18, gaseous silicon heat insulation layer 19, shielding plate 8 and shelters from drive arrangement, graphite crucible 16 forms open-ended trough-shaped structure for the upper end, and insulating ceramic layer 17 fixes the cladding in the graphite crucible 16 outside, and heating device is resistance steel sheet zone of heating 20, the fixed cladding of resistance steel sheet zone of heating 20 is in the insulating ceramic layer 17 outside, and the fixed cladding of gaseous silicon heat insulation layer 19 is in the resistance steel sheet zone of heating 20 outsides, and the outer 18 fixed cladding of panel beating parcel is in the gaseous silicon heat insulation layer 19 outside, shielding plate 8 can open and the opening of closed graphite crucible 16 upper end, shelter from the motion realization of drive arrangement drive shielding plate 8 open-ended switching, control system control shelter from drive arrangement and open and stop the action. The metal material evaporation source adopts a graphite crucible 16 and resistance heating structure, required metal materials are added into the graphite crucible 16 at one time, high-speed metal material deposition can be realized, a shielding plate 8 is arranged above the evaporation crucible, the crucible opening is shielded by the shielding plate 8 when the evaporation crucible is preheated, the metal materials are prevented from being evaporated, when film coating is started, the shielding plate 8 is moved away, the evaporation crucible opening is opened for metal film coating, the shielding plate 8 can be installed on the side wall of the evaporation crucible opening in a rotating mode around a horizontal shaft, the opening and closing of the evaporation crucible opening are realized by rotating the shielding plate 8, in addition, the shielding plate 8 can also move in a horizontal transverse moving mode, the opening and closing of the evaporation crucible opening are realized, and the like are equivalent alternative structures which can be easily thought by technical personnel in the field according to the patent, and belong to the protection scope of the patent.
The vacuum coating machine is characterized by further comprising a plurality of auxiliary rollers 3, wherein each auxiliary roller 3 can be rotatably installed in the vacuum cavity 12, a fiber fabric led out from the unwinding roller 1 is guided by at least one auxiliary roller 3 and then wound on the surface of one side of the coating main roller, the fiber fabric led out from the coating main roller is guided by at least one auxiliary roller 3 and then wound on the outer side of the winding roller 2, a discharging tension sensor 4 is arranged on one auxiliary roller 3 between the unwinding roller 1 and the coating main roller, a receiving tension sensor 5 is arranged on one auxiliary roller 3 between the receiving roller and the coating main roller, the discharging tension sensor 4 and the receiving tension sensor 5 can respectively sense the tension of the fiber fabric led out from the discharging roller and the tension of the fiber fabric to be wound on the receiving roller, and the discharging tension sensor 4 and the receiving tension sensor 5 are respectively in electrical connection and communication with the control system. The fiber fabric that draws forth from unreeling roller 1 is led by supplementary guide roll, make the winding of fiber fabric large tracts of land on the coating film main roll through the direction of a plurality of supplementary guide rolls, and keep fiber fabric and coating film main roll surface laminating inseparable, fiber fabric after the coating film is finally closely twined on wind-up roll 2 by supplementary guide roll direction back, it is neat, inseparable to guarantee the winding of fiber fabric after the winding, simultaneously, set up blowing tension sensor 4 and receipts material tension sensor 5 on the auxiliary roll 3 of different positions, and then the fiber fabric tension of perception blowing section and the fiber fabric tension of receiving the material section, finally unreel drive arrangement and rolling drive arrangement speed are adjusted according to the detected data of blowing tension sensor 4 and receipts material tension sensor 5 by control system, guarantee that fiber fabric carries out coating film coating and rolling under the tension state of settlement, guarantee the coating film quality.
And a cooling interlayer is formed inside the coating main roller and is filled with a refrigerant. The coating main roller adopts a double-layer structure, and the interlayer can cool the surface of the coating main roller to-20 ℃ by using a refrigerant to cool the fiber fabric, so that the high temperature of an evaporation source is prevented from damaging the fabric.
A preparation process of a three-dimensional porous current collector of a lithium ion battery comprises the following steps:
the method comprises the following steps: mounting a fiber fabric material roll woven by fibers on an unwinding roller 1, leading one end of the fiber fabric out of the unwinding roller 1, winding the fiber fabric on a winding roller 2 after winding around a first surface coating main roller 6 and a second surface coating main roller 7, and adding required coating materials into a first surface evaporation crucible 14 and a second surface evaporation crucible 15;
step two: closing the door of the vacuum cavity 12, starting to pump air into the vacuum cavity 12 by the vacuum pumping device, simultaneously cooling the first surface coating main roller 6 and the second surface coating main roller 7, and pumping the vacuum into the vacuum cavity 12 to 5 × 10 -4 When Pa is needed, when the first surface coating main roller 6 and the second surface coating main roller 7 are cooled to-20 ℃, the crucible heating power supply is started to heat the first surface evaporation crucible 14 and the second surface evaporation crucible 15;
step three: when the heating temperature of the first-surface evaporation crucible 14 and the second-surface evaporation crucible 15 reaches 1000 ℃, starting the wind-up roll 2, the wind-up roll 1, the first-surface film coating main roll 6 and the second-surface film coating main roll 7, and setting the linear speed to be 5m/min, the front-section tension to be 150N and the rear-section tension to be 250N; simultaneously, respectively inputting 60sccm of inert gas into the first face anode layer ion source 9 and 60sccm of inert gas into the second face anode layer ion source 10, and starting a power supply of the ion sources, wherein the voltage is set to 1500V;
step four: when the temperature of the first evaporation crucible 14 and the second evaporation crucible 15 reaches 1300 ℃ after preheating, the baffle plate 8 on the openings of the first evaporation crucible 14 and the second evaporation crucible 15 is opened, the coating material in the first evaporation crucible 14 is evaporated and then deposited on the surface of one side of the textile opposite to the opening of the first evaporation crucible 14, and the coating material in the second evaporation crucible 15 is evaporated and then deposited on the surface of the other side of the textile opposite to the opening of the second evaporation crucible 15;
step five: finally winding the fiber fabric subjected to double-sided deposition and film coating on a material receiving roller 2 to form a current collector material belt with a three-dimensional porous structure.
The fabric is used as a carrier, and a layer of metal film material is respectively deposited on the two side surfaces of the fabric in a vacuum manner by using lithium ion battery three-dimensional porous current collector preparation equipment, so that the fabric becomes a current collector with a novel three-dimensional porous structure, and the fabric with the metal film is coated maintains the flexibility and the tensile resistance of the fabric and the unique mesh characteristic of the fabric, and has the conductivity of the metal film material (the test resistance is less than or equal to 20m omega).
Compared with the current collector used in the prior art, the three-dimensional porous current collector cathode prepared by the preparation process has the following characteristics:
1. the porosity is more than 45%, the surface area is increased, and the effective reaction area of the electrode can be effectively increased;
2. the porous structure of the current collector is beneficial to reducing the generation of dendritic crystals in the charging process of the lithium ion battery and preventing short circuit in the battery;
3. the fiber structure of the fiber fabric is better combined with the electrode active substance;
4. the flexibility and the stretchability are good, and the battery is suitable for the expansion caused by heat and contraction caused by heat generated during charging;
5. the lithium ion secondary battery can be used as current collectors of the anode and the cathode of the lithium ion battery, and the performance of the lithium ion secondary battery is effectively improved.
The fiber fabric is woven by PE, PET or PI, the thickness of the fiber fabric is 5-10 um, and besides the materials, other materials can be adopted for weaving the fiber fabric.
In the first step, the required copper material or aluminum material is added into the first surface evaporation crucible and the second surface evaporation crucible at one time, and in the fourth step, copper material or aluminum material with the thickness of 1-2 um is deposited on the surface of the fiber fabric in a vacuum manner.
And (3) testing: the method comprises the steps of weaving PET fibers to form a fiber fabric with the thickness of 8 mu m, plating copper on two surfaces of the fiber fabric to obtain a lithium ion battery three-dimensional porous current collector coiled material, cutting a section of the coiled material to serve as a detection sample, respectively connecting the positive electrode and the negative electrode of an ammeter with the detection sample, and electrifying the detection sample to obtain the ammeter with the detection resistance of 19.21m omega.
Claims (7)
1. The utility model provides a three-dimensional porous mass flow body preparation equipment of lithium ion battery which characterized in that: the vacuum coating device comprises a vacuum cavity (12), a vacuumizing device, an unwinding roller (1), a winding roller (2), an unwinding driving device, a winding driving device, a coating main roller, an evaporation crucible and a control system, wherein the unwinding roller, the winding roller and the coating main roller can be respectively and rotatably installed in the vacuum cavity, the unwinding driving device and the winding driving device respectively drive the unwinding roller and the winding roller to synchronously rotate, fiber fabrics led out of the unwinding roller (1) are wound on the surface of the winding roller (2) after bypassing the surface of one side of the coating main roller to be wound, the evaporation crucible is fixedly installed in the vacuum cavity, an opening of the evaporation crucible is right opposite to the fiber fabrics on the surface of one side of the coating main roller, the evaporation crucible is provided with a heating device, the heating device can heat coating materials in the evaporation crucible, the vacuumizing device can vacuumize the vacuum cavity, and the control system controls the vacuumizing device, the unwinding driving device, the winding driving device and the heating device to operate.
2. The three-dimensional porous current collector preparation equipment of the lithium ion battery according to claim 1, wherein: the anode layer ion source is positioned in the vacuum cavity and can provide inert gas for the anode layer ion source, the anode layer ion source can face the surface of the coating main roller and emit anode layer ions on the surface of the fiber fabric facing the evaporation crucible, and the control system controls the start and stop actions of the working gas providing device and the anode layer ion source.
3. The three-dimensional porous current collector preparation equipment of the lithium ion battery according to claim 2, wherein: still fixedly in the vacuum cavity be equipped with water-cooling baffle (11), unreel roller (1), wind-up roll (2) and anode layer ion source are located water-cooling baffle one side, and the evaporation crucible is located water-cooling baffle opposite side, is formed with open structure on the water-cooling baffle, and coating film home roll just passes through with evaporation crucible one side just right the open structure stretches into water-cooling baffle opposite side.
4. The three-dimensional porous current collector preparation equipment of the lithium ion battery according to claim 2, wherein: the coating main roller comprises a first surface coating main roller (6) and a second surface coating main roller (7), the evaporation crucibles comprise first surface evaporation crucibles (14) and second surface evaporation crucibles (15), the anode layer ion sources comprise first surface anode layer ion sources (9) and second surface anode layer ion sources (10), at least one first surface coating main roller (6) and at least one second surface coating main roller (7) are arranged in a vacuum cavity in parallel at intervals, at least one first surface evaporation crucible (14) is arranged opposite to each first surface coating main roller, at least one second surface evaporation crucible (15) is arranged opposite to each second surface coating main roller, and the first surface anode layer ion sources (9) and the second surface anode layer ion sources (10) are opposite to the two side surfaces of the fiber fabric to be subjected to vacuum deposition.
5. The three-dimensional porous current collector preparation equipment of the lithium ion battery according to claim 1, wherein: evaporation crucible includes graphite crucible (16), insulating ceramic layer (17), panel beating parcel skin (18), gaseous silicon heat insulation layer (19), shielding plate (8) and shelters from drive arrangement, graphite crucible (16) forms the open-ended trough-shaped structure for the upper end, and the fixed cladding of insulating ceramic layer (17) is in the graphite crucible outside, and heating device is resistance steel sheet zone of heating (20), the fixed cladding of resistance steel sheet in insulating ceramic layer (17) outside, and the fixed cladding of gaseous silicon heat insulation layer (19) is in resistance steel sheet zone of heating (20) outside, and the fixed cladding of panel beating parcel skin (18) is in the gaseous silicon heat insulation layer (19) outside, opening with closed graphite crucible (16) upper end can be opened in shielding plate (8), shelter from drive arrangement drive shielding plate (8) motion and realize open-shut, control system control shelters from drive arrangement and opens and stop the action.
6. The three-dimensional porous current collector preparation equipment of the lithium ion battery according to claim 1, wherein: the vacuum coating machine is characterized by further comprising a plurality of auxiliary rollers (3), wherein each auxiliary roller (3) can be rotatably installed in the vacuum cavity (12), a fiber fabric led out from the unwinding roller (1) is guided by at least one auxiliary roller and then wound on the surface of one side of the coating main roller, the fiber fabric led out from the coating main roller is guided by at least one auxiliary roller (3) and then wound on the outer side of the winding roller, a discharging tension sensor (4) is arranged on one auxiliary roller between the unwinding roller and the coating main roller, a receiving tension sensor (5) is arranged on one auxiliary roller between the receiving roller and the coating main roller, the discharging tension sensor (4) and the receiving tension sensor (5) can respectively sense the tension of the fiber fabric led out from the unwinding roller and the tension of the fiber fabric to be wound on the receiving roller, and the discharging tension sensor (4) and the receiving tension sensor (5) are respectively in electrical connection and communication with the control system.
7. The three-dimensional porous current collector preparation equipment of the lithium ion battery according to claim 1, wherein: and a cooling interlayer is formed inside the coating main roller and is internally communicated with a refrigerant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220156085.2U CN217955892U (en) | 2022-01-20 | 2022-01-20 | Three-dimensional porous current collector preparation equipment of lithium ion battery |
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| CN202220156085.2U CN217955892U (en) | 2022-01-20 | 2022-01-20 | Three-dimensional porous current collector preparation equipment of lithium ion battery |
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| CN217955892U true CN217955892U (en) | 2022-12-02 |
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